Ryry: A Real-Time Score-Following Automatic Accompaniment Playback System Capable of Real Performances with Errors, Repeats and Jumps

摘要

In this work, we propose an automatic accompaniment playback system called Ryry, which follows human performance and plays a corresponding accompaniment automatically, in an attempt to realize human-computer concerts. Recognizing and anticipating the score position in real-time, known as score following, by a computer is difficult. The proposed system is based on a robust on-line algorithm for real-time audio-to-score alignment. The algorithm is devised using a delayed-decision and anticipation framework by modeling real-time music performance that includes uncertainties such as tempo fluctuation and mistakes. We developed an automatic accompaniment system that is capable of generating polyphonic music signals.